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ProMAXX Cylinder Heads_Ford FE Series_Shocker CNC_200cc_2.090/1.660_72 cc
ProMAXX Cylinder Heads

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Optional Cylinder Heads

PMX-9230 Bare
PMX-9231 Hydraulic Flat Tappet
PMX-9232 Hydraulic Roller


ProMAXX Shocker CNC Series is the top of the line performance cylinder head. It features professionally designed runners and chambers that are meticulously CNC ported. The all new ProMAXX ultra smooth Grade A 356-T6 aluminum casting is CNC machined to create the perfect platform for newly developed runner and chamber designs. This is combined with a 5 angle competition valve job, diamond honed bronze guides, large spring pockets and professional assembly, performed right here in the United States. Pro MAXX Shocker CNC Heads are proof that going fast doesn’t have to break the bank.

  • 200cc Intake runner
  • Ultra smooth 356-t6 Aluminum
  • Precision CNC Machining
  • Unshrouded chamber
  • Diamond honed guides
  • Large spring pockets
  • 5 angle valve job
  • Precision CNC machining
  • Multiple spring options


Assembled heads feature:
  • One piece stainless steel valves
  • 21-4N back cut, swirl polished
  • Multiple spring options
  • Designed, machined and assembled in the USA

Item# Item Name Price Qty Add
PMX-9230 Shocker CNC_Ford FE_200cc_Bare
$2,400.00
PMX-9232 Shocker CNC_Ford FE_200cc_H/R_.700 Max Lift
$2,945.00
PMX-9231 Shocker CNC_Ford FE_200cc_HFT_.600 Max Lift
$2,790.00
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Flow Chart:

Flow Data: cfm @ 28 inches of Water
Lift .100 .200 .300 .400 .500 .550 .600 .700 .800
Intake 90 191 230 277 309 318 331 346 351
Exhaust 66 142 163 196 227 240 254 267 249




Technical Specs:
Item Code PMX-9230-000
Vendor ProMAXX Performance Products
Product Type Cylinder Heads
Product Model Shocker CNC Series
Engine Family Ford FE Series
Material 356-t6 cast aluminum
Weight 50 lbs
Combustion Chamber 72 cc
Plug Orientation Straight
Intake Runner 200 cc
Exhaust Runner 125 cc
Intake Valve Diameter 2.090
Exhaust Valve Diameter 1.660
Valve Seats Hardened Steel
Valve Guides Manganese Bronze
Valve Seals Viton
Standard Retainers Steel
Valve Job Type 5 Angle
Head Bolts ARP 155-3601
Valve Spacing OEM
Intake Gasket Fel-Pro 1442
Exhaust Gasket Fel-Pro 1020
Head Gasket Fel-Pro 1020
Spark Plug .750 Reach Gasket Seat
Torque Specifications 80 ft lbs in 3 increments using 30wt oil




Valve Spring Pressures:

Hydraulic Flat Tappet - .600 Max Lift
Closed 145 lbs @ 1.950
Open 350 lbs @ 1.350

Hydraulic Roller - .700 Max Lift
Closed 175 lbs @ 2.000
Open 525 lbs @ 1.300




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Cylinder Heads > ProMAXX Cylinder Heads > Ford _ FE Series